Question

The nature of charge on resulting colloidal particles when $FeC{l}_3$ is added to excess of hot water is:

• A. positive
• B. neutral
• C. sometimes positive and sometimes negative
• D. negative

Answer 1

The correct option is A positive

If $FeC{l}_3$ is added to excess hot water, a positively charged sol of hydrated ferric oxide is formed due to the absorption of $F{e}^{3+}$ ions.
Negatively charged sol of hydrated ferric oxide is formed when ferric chloride is added to NaOH solution.